Hi Vishal,
Thankyou for your interest in Essential HTMLUI.
The users who buy the Syncfusion product with the source code are allowed to change the source code to fit their needs within their machine. Please refer the link below for the advantages of getting HTMLUI with complete source code.
http://www.syncfusion.com/Sales/faq/Sales_c33c.aspx#q308q
The users are not allowed to ship files using the Syncfusion public keys if they have modified and built the files. Only Syncfusion pre-built files can use the public keys.
Please refer the link below for further details regarding this issue.
http://www.syncfusion.com/support/kb/studio/Default.aspx?ToDo=view&questId=16
We appreciate your interest in Syncfusion products.
Regards,
Nanda